Battlefield Control Master

You have practiced casting simultaneous spells in order to tactically control the battlefield, learning techniques that grant you the following benefits:

• You can concentrate on two spells. Only one of the two spells can have a damage dealing effect.  
• You have disadvantage on Constitution saving throws that you make to maintain your concentration on two spells when you take damage. If you fail the saving throw you lose both spells and cannot concentrate on two spells again for 1d4 rounds. 
• Due to the incredible strain on you when you are concentrating on two spells, while you are doing so, your speed is halved and you cannot utilize any teleportation spells (including magical abilities or spell like abilities).